Sectional pneumatic tire.



No. 856,411. PATENTED JUNE 11, 1907.

G. P. MAINS.

SEGTIONAL PNEUMATIC TIRE. APPLIOATION FILED NOV. 15, 1905.

UNITED STATES PATENT CFFICE.

CLAUDE P. MAINS, or CINCINNATI, OHIO ASSIGN OR or ONE-HALF To c osen DEDDENS, or CINCINNATI, OHIO.

'SECTIONALI PNEUMATIC TIRE.

Specification of Letters-Patent.

Patented June 11, 1907.

T (11M whom it may concern:

Be it known that I, CLA DE P. MArNsfa citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Sectional Pneumatic My invention also consists in the parts and in the combination and arrangement of parts as' will hereinafter be more fully described and claimed.

In the drawing: Fi ure 1 represents art of a Wheel, partly in e evation and part y is section, provided with my improved tire,

some of the chambers being represented as inflated, the double chamber construction being here employed. Fig.2 is a perspective view of one of the chambers removed from 'the wheel, showing the." arrangement of the parts when the double chamber is used. Fig.

3 .is an enlarged section showing a modificatron. Fig. 4 1s a c oss sectlon on 9. km corresponding to m-:z: f Fig. 3. Ifig. 5 is a cross section on a line' correspondin to y y of Fig. 3 showing the single cham er construction. Fig. 6 1s a side elevation of a portion of a wheel provided with my improved tire in which the chambers take the form of segments rather than the spheroidal form shown. inithe preceding figures.

The construction of my improved tire is substantiaily as follows:

- The rim 1 of the wheel is provided with the pockets or depressions 2 as shown in Figs. 1 and 6 ,or the continuous circumferential fioove or de ression 2 as shown in Fig. 3. to the poo etsor groove, as the case may be, are inserted the lugs 3 of the chambers 4 referablysformed of rubber. The lugs 3 ave bolt holes 5 correspondin with similar holes in therim 1 and through these holes are inserted bolts havin nuts 7 with which they are-drawn up to he (I the chambers 4 in place. I prefer toprovide the bolts 6 with a taper 8 under the head, and to taper the holeondinglv, so that when '5 1n the lug corres tight, the chamber will the nut 7 is screwe upon the i Y be themore tightly held in place upon the" rim. When the pockets 2 are used the lugs 3 are of corresponding length, but when the continuous depression is used the lugs are made to form perfect segments and are allowed to. abut as at 9, and their wedgelike shape allows them to be ti htly held by the bolts 6. In the drawing I have indicated some of the chambers or'sections as being in: fiated, as indicated at 4.

Each chamber is provided with an iillet tube 10 having the usual check valve therein and this tube 10 is extended through an open' ing in the rim 1 and provided With'a cap 11 as shown. The double chamber consists of the outer chamber 4 inclosing the inner chamber 4 having its inlet tube 10 extending through the outer lchamber at 12. .The outer cham ber, in order to allowof the insertion andremoval of the inner chamber has the mouth 13 in the lug. The corners of this month are reinforced as shown zit-14 to prevent tearin of the chamber at that point when the mout is'opened. To facilitate the opening of the mouth, suitable recesses 15 are provided I which allow of the insertion. of anyobject I adapted to pull the lips 16 apart.

In both the sinile and double chamber ally projecting ribs 17 adapted'to engage:

construction thee embers have the later:

under the inwardly projecting flange- 18,05

the rim to assist in holdinguthe chambers in proper position and relieve the lateralstrain f; 4 a pneumatic tire made upfof of a pneumatic tire 1S impaire but little 1 owing to the fact that it is under external pressureonly whenit', individually,- is bearings, ound. As the section is small its own elasticity tends to keep it in spherical shape and filled .with air at atmospheric pressure. It is diflicult to force thisair; through a puncture of the usual size and as; theperiod of ressure'is necessarilyshort when the whee is rolling at the usua ate of speed, very little of the air will he forced out of the chamber. With the continuous tire the air within is subjected to a continuous pressure and is consequently soon forced out. through the puncture.

WVhile it is possible as above pointed out, to continue the use of the punctured section, it may be readily removed by taking out the bolts, and a new section, already inflated may be bolted in its place. The valve leakage also is reduced to a minimum because the period of pressure upon the section is short, and owing to the comparatively small size of the chamber, a highpressure may be maintained, if desired.

While I have described and shown a particular construction, I do not wish to be understood as limiting myself to it, but

What I desire to secure by Letters Pat ent is:

A sectional pneumatic tire comprising a plurality of spherical chambers 4 each provided with a lug 3 and laterally project ng ribs 17 in combination with pockets 2 and flanges 18 adapted to receive said lugs 3 and ribs 17, respectively, and a bolt 6 having a taper 8 under its head adapted to enter hole 5 and nut 7 screwed thereon whereby said parts are securely held in fixed relation to each other, substantially as and for the purposes set forth.

' CLAUDE P. MAINS.

Witnesses:

JAMES N. RAMsEY, LILLIE M. SIMON. 

